Extrasolar Planetary Survey
Mission EPS451
Spacecraft Design Tables


Last update: 7 December 1998


For instrument descriptions, click on the links, or see the Spacecraft Instrument Description page.

Note: these options are currently under development, as "new technology" makes itself available. Keep checking this page for updates.


Mission Design Parameters:

Cost: $75 million
Weight: 100 kg


Spacecraft Platforms

Delivery Platform
Cost
(million $)
Weight
(kg)
Power
(W)
Planetary Flyby (Flyby)
(allows probes)
35.0
40.0
25.0
Planetary Orbiter (Orb)
(allows probes, landers, rovers)
40.0
50.0
25.0




Spacecraft Science Instruments

Instrument
Cost
(million $)
Weight
(kg)
Power
(W)

Direct-Sensing Science Instruments

High-energy particle detector (HEP)
(30 keV - 3 MeV )
1.5
1.0
4.0
Plasma instrument (Plas)
(detects low-energy plasma)
4.0
5.0
5.0
Dust detector (Dust)
(particulate mass & composition)
8.0
8.0
10.0
Magnetometer (Mag)
(magnetic field intensity and direction)
1.0
1.0
1.0
Plasma wave detector (PWD)
(amplitude, frequency, direction)
4.0
4.0
6.0
Atmospheric Sensing Package (Atm)
(temperature, pressure, velocity)
0.5
1.0
0.5
Atmospheric Analysis Package (AtCo)
(atmospheric composition)
3.0
3.0
5.0
Seismometer (Seis)
(for lander)
2.0
1.0
1.0
Soil Penetrator (SPen)
(for hard impact probe)
1.0
3.0
0.1
Soil Scoop
(for lander or rover)
0.5
1.0
5.0
Soil Analyzer (Soil)
(requires scoop)
1.5
1.0
5.0
Life Analysis Experiment (Life)
(requires scoop)
2.0
1.5
6.0

Remote-Sensing Science Instruments

Radio Astronomy Instruments
Low-Frequency Planetary Radio Telescope (LFPRT)
(w/ small antenna)
3.5
4.0
6.0
High-Frequency Planetary Radio Telescope (HFPRT)
(w/ small antenna)
7.0
5.0
10.0
Imaging Instruments
Lo-Res video imager (LRVI)
(64x64 pixels, for probe or rover)
0.5
1.0
1.0
Lo-Res imager (LRI)
(128x128 pixels)
2.0
2.0
2.0
Hi-Res imager (HRI)
(256x256 pixels)
6.0
4.0
4.0
Wide-Field Camera (WFC)
(512x512 pixels, 30mm)
10.0
6.0
5.0
Hi-Res Wide-field Planetary Camera (HRWFPC)
(1024x1024 pixels, w/filters)
25.0
25.0
8.0
Multi-spectral filters (+f)
(Imager Add-on, no extra DPU)
+1.0
+1.0
na
Spectro-photometer (SpPh)
(measure intensity with wavelength)
3.0
4.0
5.0
Spectrometers
Alpha-Proton X-Ray Spectrometer (APXS)
NEW! (for rover)
3.0
3.0
4.0
Imaging spectrograph (ImS)
(near-UV to near-IR)
5.0
14.2
8.0
X-ray spectrograph (XRS)
(keV range)
7.0
15.0
7.0
Gamma-ray spectrograph (GRS)
(MeV range)
6.0
10.0
4.0
Synthetic aperture radar imaging (SAR)
(planetary radar mapper)
16.0
30.0
80.0
Altimeters
Laser rangefinder (LRF)
(range to unobscured surface)
5.0
4.0
10.0
Radar rangefinder (RRF)
(works through clouds)
6.0
8.0
10.0

Essential Spacecraft Systems

Computers
Data Processing Unit (DPU)
(1 needed for each 3 instruments)
first 2.0
additional 1.0
1.0
5.0
Power Supplies
Large Solar Panels
(per 1 square meter panel)
2.0
+1.0 per square meter
2.0
+2.0 per m^2
na
Small Solar Cells
(per 1 square centimeter area)
0.05
+0.05 per square cm
0.05
+0.05 per cm^2
na
Small Ion Battery
(stores 1kW hour)
0.1
0.2
na
Large Ion Battery
(stores 10kW hours)
0.5
1.0
na
Nuclear Generator
(generates 1kW)
15.0
25.0
na
Spacecraft Shielding
Light Radiation Shielding
(moderate radiation environments)
1.0
5.0
na
Medium Radiation Shielding
(high radiation environments)
2.0
10.0
na
Heavy Radiation Shielding
(harsh radiation environments)
3.0
15.0
na
Light Micrometeorite Shielding
(up to micron dust and micrometeors)
1.0
5.0
na
Heavy Micrometeorite Shielding
(up to millimeter sized micrometeors)
3.0
15.0
na
Pressure Shielding
(up to 100 bars)
5.0
7.0
na




Probes, Landers and Vehicles

Sub-Orbital Vehicle
Cost
(million $)
Weight
(kg)
Power
(W)
Atmospheric Descent Probe (Atm)
(drops into thick atmospheres)
15.0
30.0
10.0
Hard Impact Probe (HIP)
(flyby or orbiter)
15.0
30.0
10.0
Soft Planetary Lander (Land)
(requires orbiter)
25.0
40.0
20.0
Planetary Micro-Rover (Rov)
(requires orbiter and lander)
5.0
5.0
50.0




Instrumentation adapted from the NEAR project, and the NASA Missions page.

Disclaimer: This mission was fabricated by me, and has no offical association with NASA. I "borrowed" their logo for authenticity. I make no claim that the above numbers are in any way realistic.


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smyers@nrao.edu   Steven T. Myers